You know, for search

You know, for search

# Test whether ES started successfully

GET ?pretty

# Count the number of documents in the cluster

GET /_count?pretty
{
  "query": {
    "match_all": {}
  }
}

# Create index  
# If there is data, append data, if there is no index, create by default
# index name/type name/id

PUT /megacorp/employee/1
{
  "first_name" : "John",
  "last_name" : "Smith",
  "age" : 25,
  "about" : "I love to go rock climbing",
  "interests" : ["sports", "music"]
}

PUT /megacorp/employee/2
{
  "first_name" : "Jane",
  "last_name" : "Smith",
  "age" : 32,
  "about" : "I like to collect rock albums",
  "interests" : ["music"]
}

PUT /megacorp/employee/3
{
  "first_name" : "Douglas",
  "last_name" : "Fir",
  "age" : 35,
  "about" : "I like to build cabinets",
  "interests" : ["forestry"]
}

# Retrieve documents
# _source attribute is the original json document

GET /megacorp/employee/1
GET /megacorp/employee/2
GET /megacorp/employee/3

# Update document
# Just PUT again.
# Note, complete coverage update, including reducing fields

PUT /megacorp/employee/3
{
  "interests" : ["forestry", "programming1"]
}

# Delete document

DELETE /megacorp/employee/3

# Check if the document exists

HEAD /megacorp/employee/3

# Search all employee information
# The returned result is in hits

GET /megacorp/employee/_search

# Use query-string for lightweight search

GET /megacorp/employee/_search?q=last_name:Smith

# Use query expression search
# Query type match

GET /megacorp/employee/_search
{
  "query": {
    "match": {
      "last_name": "Smith"
    }
  }
}

# Use more complex search
# Query Smith employees who are older than 30 years old

GET /megacorp/employee/_search
{
  "query": {
    "bool": {
      "must": {
        "match" : {
          "last_name" : "Smith"
        }
      } ,
      "filter": {
        "range": {
          "age": {
            "gt": 30
          }
        }
      }
    }
  }
}

# Full-text search
# match based on word search

GET /megacorp/employee/_search
{
  "query": {
    "match": {
      "about": "rock climbing"
    }
  }
}

# match_phrase based on phrase search

GET /megacorp/employee/_search
{
  "query": {
    "match_phrase": {
      "about": "rock climbing"
    }
  }
}

#Highlight search

GET /megacorp/employee/_search
{
  "query": {
    "match": {
      "about": "rock climbing"
    }
  },
  "highlight": {
    "fields": {
      "about": {}
    }
  }
}

#Analysis
# Most popular hobbies

GET /megacorp/employee/_search
{
  "aggs": {
    "all_interests": {
      "terms": {
        "field": "interests.keyword"
      }
    }
  }
}

# Smith's most popular hobby

GET /megacorp/employee/_search
{
  "query": {
    "match": {
      "last_name": "Smith"
    }
  },
  "aggs": {
    "all_interests": {
      "terms": {
        "field": "interests.keyword"
      }
    }
  }
}

# Summary

GET /megacorp/employee/_search
{
  "aggs": {
    "all_interests": {
      "terms": {
        "field": "interests.keyword"
      },
      "aggs": {
        "avg_age": {
          "avg": {
            "field": "age"
          }
        }
      }
    }
  }
}